Early computers were physically enormous machines run from consoles.
The programmer, who was also the operator of the computer system, would
write a program and then would operate the program directly from the
operator's console. First, the program would be loaded manually into memory
from the front panel switches (one instruction at a time), from paper tape, or
from punched cards. Then the appropriate buttons would be pushed to set the
starting address and to start the execution of the program. As the program ran,
the programmer I operator could monitor its execution by the display lights on
the console. If errors were discovered, the programmer could halt the program,
examine the contents of memory and registers, and debug the program directly
from the console. Output was printed or was punched onto paper tape or cards
for later printing.
Early computers were physically enormous machines run from consoles.
The programmer, who was also the operator of the computer system, would
write a program and then would operate the program directly from the
operator's console. First, the program would be loaded manually into memory
from the front panel switches (one instruction at a time), from paper tape, or
from punched cards. Then the appropriate buttons would be pushed to set the
starting address and to start the execution of the program. As the program ran,
the programmer I operator could monitor its execution by the display lights on
the console. If errors were discovered, the programmer could halt the program,
examine the contents of memory and registers, and debug the program directly
from the console. Output was printed or was punched onto paper tape or cards
for later printing.
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